#include "Mystdio.h"
#include<unistd.h>
#define myfile "test.txt"

int main()
{
    _FILE *fp=_fopen(myfile,"w");
    if(fp==NULL) return 1;

    const char *msg="hello world\n";
    int cnt=10;

    while(cnt){
        _fwrite(fp,msg,strlen(msg));
        sleep(1);
        cnt--;
    }

    _fwrite(fp,msg,strlen(msg));

    _fclose(fp);
    return 0;
}
